Answers for "what is the difference between primary key and unique key in sql"

difference between unique vs primary key in sql

What is the difference between UNIQUE and PRIMARY KEY constraints? 
There should be only one PRIMARY KEY 
in a table whereas there can be
any number of UNIQUE Keys.
PRIMARY KEY doesn’t allow NULL
values whereas Unique key allows NULL values.

Posted by: Guest on December-23-2020

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Answers for "what is the difference between primary key and unique key in sql"

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Answers for "what is the difference between primary key and unique key in sql"

Code answers related to "what is the difference between primary key and unique key in sql"

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